Cutting attachment for tufting work



Oct. v12, 1937. N, A 2,095,916

CUTTING ATTACHMENT FOR TUFTING WORK Filed July 31, 1936 ATTORNEYSPatented out 112, 1937 1; u The inventionrelates to w for sewingmachinesi and regespecially gto a cutting attachment qfor; 3 tuftingwork '0 i onx heavyldutyt sewing machinesni 5 i The primary. objectofithe inventioiristhepro 1 I l vision of an attachment of this character,wherein thecuttinglblade is pivotally held in place by a leaf springfsothat said blade can be convenh iently and easily removed when it isrequired t that theysanie be sharpened a nd said bladeis of j inovelconstruetion for coaction with a hook whichisadaptedto passthroughtheloop of the fthread when carried downwalidlyby theneedle{ofthe sewing machine so that said loopcan be the formation of pile uponaxpiece of work.

sion of an attachment of this character, wherei in. the mounting of theloop hook and the blade 20 is novel and lunique, the bladeland the hookbeing fastened-for cooperation with eachother in when the occasionrequires-for; replacement or i for conditioning as the occasion mayrequire.

vision of an attachment of; this characten which is extremely slmple inits construction, thoroughly reliable and effeetive infits operation,auto matic in theworking thereofgstrong, durable,and 30 inexpensivetomanufacture and install.

With these and other objects in view, the incombinatiori and arrangementof parts will be hereinafter more fully described, illustrated intheaccompanyingdrawingywhich discloses the preferred embodiment of theinvention and pointed out in the claims hereunto appended.

In the accompanying drawinga 1 l I l Flgurel is aside elevation ofthejattachinent =9 constructed in accordance with theinvention showingthe blade in open position.

Figure 2 is a view similar to Figure 1 showing Figure 3 is a sectionalview on the line 3- 3 of w nates generally the oscillatorymemberofthe attachment which is inthe form of a straight arm l0 having a laterallyoffset hub H at its lower 5 end and this hub is fitted upon a stationarybolt ith" an at; isaafseriai No... 93,11; t I. *zfoiaims. (o1.- i a-rs ww w h or rod (not shownlgas built within a heavy'duty 5 severed orcut bythe cutting blade for tufting in Another objector the invention. is theprovi a simple mannerso that these .can -be removed vention consists inthe features of construction,

Figure 4 is aperspective view of the blade de- PATI T F CEsewingmachine, thejarm being free on this bolt or rod-so as tomoveqbackand forth when operatedbyabar which extends from the feed bardown we. the arm and havingconnection there- 5 withpthe barbeingialsonotshown. Formed at the upper end in one side face of the arm ill is arecess 12in which is seated a loop hook I 3 which has the bill I4projected outwardly at a slight angle to the longitudinal axis of thesaid arm II]. This hook i3 is separably secured to the arm Ill by aremovable bolt or screw l5 which is loosely passed through the armtransversely thereof and threaded into said hook so that such hook isreadily detachable at will. 15

At the uncovered side of thehook I3 is a cutting blade l6 which tapersin one direction and in the narrow 'end thereof isprovided a notch [1while at the wider endis formed a beveled cutting edge l8 which is nextto the bill 14, the beveled cutting edge I B being extended for a dis wthe blade I6 is an opening 20 for accommodating A further object oftheinventionisthe proa stepped pivot stud 2| fixed to and projectedinwardly from a blade leaf spring 22. This spring 22 at its lower end isdetachably fastened by fasteners 23 upon a bearing 24 built with the armAvand projected outwardly from one face thereof. a

Intermediate of the spring 22 is an adjusting screw 25 which is looselypassed through a suitable opening therefor in said spring and isthreaded in a socketZB in the arm in to vary thetension of the saidspring. Thus by the pivoting 2| the blade "I6 is hung for swingingmovement with relation to thearm ill, the said blade i5 being providedwith a dished'area 21 Y which places the cutting edge I8 in closerelation to the bill I of the hook l3 for assuring a 40 positive cuttingaction in the working of the attachment. The blade l6has fitted in itsnotch H a pivot stud 28 on a control rod 29. so that the said blade willbe operated for opening and closing movements under the approach andreceding of the hook i3 to and from the work in the working of thesewing machine and under such movements the bill M of the hook willenter theloop of the thread looped by theflsewing machine to hold suchloop whereby the blade l6 will sever it for tufting work in the formingof pile thereon. h

The spring 22 will allow for the easy removal of the blade l8 which ishung .pivotally by said spring in working relation to the hook l3 sothat such blade can be replaced, sharpened or properly conditioned forthe successful working of the attachment in tufting work with the use ofthe attachment in a heavy duty sewing machine.

The loop of the thread under the operation of the sewing machine iscarried forth downwardly through a piece of fabric and the loopsiournaled on said bolt and having a transverse recess at the end remotefrom said bolt,- a'loop other end releasably pivoted to said blade, a-

connection between said control bar and said blade, and an adjustingscrewlooulypassed through the spring intermediate thereof and engaged inthe arm.

2. A tufting attachment for a sewing machine having a stationary pivotbolt for an oscillatory member and also provided with a reciprocatorycontrol bar, comprising an oscillatory stroke arm journaledon saidjboltand having a transverse recess at the end remote from said bolt, a loopengaging hook releasably seated in said recess,

'an' opening and closing cutter blade cooperating with said hook andpivoted to the arm, a leaf spring having" one end ilxed to said arm andits other end releasably pivoted to said blade, a

connection between said control bar and said blade, an adjusting screwloosely passed through the spring intermediate thereof and engaged inthe arm, saidblade being tapered in one direction withits narrow endconnected with said engaging hook releasably seated in said recess,

bar, a beveled cutting edge formed on the 'wider end of the blade nextto'the-bill'and extended for-a distance'toeiiect a blunt heel portion,and

anoutwardIy'dIshed area formed on the blade next to said cuttingedgefor'placing the'latter in close'rela'tion tothe'bill of the hook;

a Born-mesons.

